Before the rolling totes were invested, pilot cases were the wheeled trolley for business. Most business udders chose them and especially those that needed a large capacity of the business products to be stored. So, anyone looking forward to getting a portable carrying case where they can store folders and documents can opt for these cases. If you ever get to compare the rolling totes with pilot cases, then there only exists a difference in a private area that is usable.
Product description of the pilot case

Safe and secure
An Aluminum Hard Case attaché has document pockets where you can carry the documents for the work. You can use high-quality cases for taking 15” and 14” notebooks. The lock combinations in the cases are very secure, and you do not have to lose sleep over the safety factor. You can travel all across the world with hard pilot cases.